Gas-stove



J. F. DOMHOFF AND R. M. SABO.

Pdtented July. 19, 1921,

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EUDUEIEIE] SUEDE] J. FQDOMHOFF AND R. M. SABO. GAS STOVE.

' APPLICATION man IAN-3,1921.

1,385,310. Patented July 19, 1921.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

JOHN F. DOMHOFF AND ROBERT M. SABO, OF EAST ST. LOUIS, ILLINOIS.

GAS-STOVE.

To all whom it may concern lle it known that we, JOHN F. DoMHorr andllonnn'r M. Sane, citizens of the United States, residing at East St.Louis, in the "county of St. Clair and State of Illinois,

have invented certain new and useful Improvements in Gas-Stoves, ofwhich the following is a specification.

he present invention relates to gas stoves, articularly of the heatingtype.

An oliject of the present invention is to provide a stove structurewherein the gases issuing from the one or more burners will becompletely consumed before leaving the stove structure to prevent theeseape of unconsumed gases into the room or inclosure in which the stoveis used.

Another object of the invention is vide a gas stove structure which mayhe made economically from sheet metal, for the most part, and which isso constructed as to efficiently utilize the heat radiating from asingle burner for heating a relatively large volume of air maintaining arelatively large volume of the air in constant circulation in the roomor inclosure.

The above, and various other objects and advantages of this inventionwill in part be described in, and in part understooc from, the followingdetailed description of the present preferred embodiment, the same be-1ng illustrated in the accompanying drawings, wherein;

Figure 1 is a front elevation of a heating stove constructed accordingto the present invention;

Fig. 2 is an end elevation of the same;

Fig. 3 is a top lan view thereof;

Fig. 4 is an en arged transverse section through one corner of thestove, showing the manner of locking the side walls of the stovetogether;

Fig. 5 is a fragmentary enlarged vertical section through the upper endof one of the corner posts of the stove, showing a cap iece and theposition of the stove top there- Eeneath;

Fig. 6 is a fra mentary enlarged vertical section through t corner postsshowing a foot piece applied thereto;

Fig. 7 is a transverse section taken through the stove substantially onthe line 77 of Fi 8' I l ig. 8 is a. longitudinal section taken from topro- Specification of Letters Patent.

e lower end of one of the Patented July 19, 1921 Serial No. 434,718.

side to side through the stove and substantially mid-way between thefront and back walls thereof;

Fig. 9 is a fragmentary enlarged section taken through a portion of thefront wall of the stove, showing a side opening and air feeding openingfor the burner;

Fig. 10 is a. detail enlarged outer end view of the burner and itsfittings; and

Fi 11 is a fragmentary enlar ed sectiona view through the outer cm ofthe burner, showing the manner of mountin the same in the front wall ofthe stove.

eferring to these drawings, wherein like parts are designated by similarnumerals of reference throughout the several views, the stove comprisesa front wall 20, a rear wall 21, and opposite end walls 22 and 23.

he walls are preferably made from thin sheet metal and at opposite ends,as shown in Fig. 4, are bent at right angles to form locking flanges 24,and the flanges 24 are turned outwardly, or toward the outer sides ofthe walls to provide abutting angles 25 at the ends of the walls andforming corresponding pockets or shoulders at the opposite sides of thewalls between the flanges 24 and the bodies of the walls.

The ends of the walls are held together by posts or standards 26 oftubularform and which are split longitudinally throughout their lengthsand adapted to be spread at the split for frictionally receiving thereinthe angle portions 25 of the walls.

The inherent resiliency of the tube 26 is adapted to bind the angles 25together, and the flanges 24 are of sufficient length to engage theinner walls of the tube 26 to yieldlngly urge the split edges into theshoulders or pockets formed in the outer sides of the angle portions.Thus, the flanges 2-1L hold the angle portions 25 in alinement and the slit tube 26 binds the ends of the walls to et er.

hese posts 26 may be provided with cap pieces 27 in the form of threadedferrules engaged over the upper ends of the tubes 26 to maintain thesame tight against the angles of the walls, and the ferrules may havefanciful configuration at their upper ends for the purpose ofornamentation, and as shown, are of substantially spherical or ball shae. i

e lower ends of the tubes or posts 26 may be provided with foot pieces28 of rubber or'like material in the form of ferrules adapted to befitted over the lower ends of the tubes for supporting the same and toprevent injuryto floors and other surfaces upon which the stove mayrest.

The walls of the stove are overturned or crimped at their lower ends toprovide a double thick depending flange 29 extending entirely upon thebottom of the stove body for reinforcing the same, and the up-turnededges of the walls are projected inwardly toward each other to form aninner ledge 30 which also tends to make 'rigidthe lower end of the stovebody.

The upper' ends of the body walls are crimped outwardly to form areinforcing bead 31 which strengthens the upper end of the stove bodyand which is adapted to receive thereover the depending flange 32 of atop wall or cover 33.

The cover 33, as shown in Figs. 3 and 8, maybe made from sheet metalwith its depending flange 32 and with openings 34 at its corners throughwhich the corner posts 26 may project. The cap pieces 27 are adapted tobe screwed downover the upper. ends of the corner posts and thus bindthe cover 33 upon the upper edges of the body walls.

It will be noted that the upper edges of the walls terminate inin-turned flanges,

completingthe formation of the beads 31, and thus provide 'a relativelybroad supporting edge about the upper margin of the stove body forsupporting the top 33. V

The'top 33 may be provided with any suitable openings through whichheated air passing upwardly through; the stove body may escape, and inthe present instance, the top 33 is provided with a grating 35 formed bystamping or otherwise cutting rows of aperturesin the top. j

The body of the stove is-providedwith three main elements, a moisteningpan 36, a heating drum 37 and a super-heating drum 38.

The moisture pair 36 is of suitable size and is slidably mounted upon apair of cleats 39 which are secured across the lower ledges 30 of thestove and which is removable through an opening formed in the bottomportion of the front wall 20. Preferably, the forward end of the pan 36is provided with a cover plate 40 adapted to fit. against the exteriorsurface of the front wall 20 and close the pan 36 therein, the coverplate 40 carrying 'a suitable knob or handle41 by means ofiwhich the panmay be easily and quickly removed andreplaced. I

'The bottom of the stove is otherwise left uninterrupted for the freepassage of-air upwardly therethrough. Above the moisture is disposedtheheating drum. This comprises a sheet metal structure which is of .alengthslightly less than that of the ,stove'body to provide, between theends of the drum 37 and the end walls 22 and 23 of the stove, passages42 for the air which rises about the moisture pan 36.

. From Fig. 7 it will be noted that a passage 42 is provided at the backof the drum 37 as well as at its sides. The forward side of the heatingdrum 37 terminates in an opening 43 formed in the front wall 20 of thestove and through which air may readily pass to the interior of theheating drum 37, and if desired a transparent pane 44 may be placed inthe front wall 20 above the opening 43 to permit inspection of theinterior of the heating drum 37 for determining the condition of burningof the gas therein.

The top of the heating drum 37 is left open and the drum 37 is supportedin the stove body by straps or cleats 45, suitably spaced apart aboutthe drum 37 and secured at their lower ends thereto and at their outerends to the walls of the stove body.

For the purpose of directly heating air in the drum 37 a burner tube 46is arranged lengthwise therein, the inner end of the tube 46 beingsupported by a depending flange 47 on the tube secured by a screw 48 orthe like to the inner wall at one side of the drum 117.

The other end of the burner tube 46 is enlarged, in the usual manner,and, as shown in detail in Fig. 11, is provided with an external annularshoulder 49 adapted to seal in an outward depression 50 formed in theadj acent side wall 22 of the stove body and .the shoulder 49 is adaptedto support the outer end of the burner tube and to also hold the burnertube from shifting longitudinally through the heating drum 37.

As shown in Fig. 7, the burner tube 46 is preferably provided with aplurality of downwardly projected jets or openings 51 adapted to projectstreams of gas into the lower end of the drum 37 for insuring a completeburning of the gases during their passage upwardly through the drum 37.

The burner tube 46 is provided with a suitable gas cook 52 connected toa flexible tubing 53, or other suitable source of gas supply.

The super-heating drum 38 is preferably in the form of a sheet metal boxopen at its top and closed at its bottom and side and end walls toprevent a free circulation of air therethrough. This super-heating drum33 is suspended by straps 54 from the beads 31 at the upper ends of thestove walls and is adapted to project down into the upper end of theheating drum 37 to a considerable extent, such as substantially half thedepth of the super-heating drum 38.

The arrangement, of course, may be varied with conditions met. with inthe use of the stove. The box or drum 38 is of less long-i tudiual andtransverse dimensions than that of the upper end of the drum 37 so thatthere is provided about the super-heating fill l. Hl

drum 38 a passage or channel 55 for escape of the burning gases and airfrom about t 1e burner 46 to the top of the stove.

This super-heating drum 38 is placed immediately above the burner 46 soas to directly receive the intense heat therefrom and to thus be raisedto a relatively high temperature. This rising in temperature of thesuper-heatin drum 38 is augmented by the fact that t e free circulationof air through the drum is considerably checked as the top of the drumonly is open.

The result is that the air and gases assing upwardly through the drum 3is brought in contact with the highly heated surface and in a restrictedpassage so that any gases which are unconsumed and tending to escapethrough the top of the drum 37 will be ignited and thoroughly consumedbefore the air and gases reach the top 33 of the stove.

By use of this super-heating drum the gases which escape from the burnerof a gas stove and which are usually liberated into the room orinclosure, are completely consumed so that the air in the room orinclosure is not vitiated by reason of admixture of the free gasestherewith.

The air which rises through the bottom of the stove body, carries withit a certain amount of moisture from the water pan 36 and the moistureladen air coming in contact with the drum 37, is heated thereby, and iscaused to rise about the drum 37 and into contact with the super-heatedair and gases issuing upwardly through the channel 55. The two streamsof a1r and heated products of combustion are brought together beneaththe top 33 of the stove and are caused to rise therethrough andthoroughly admix in their passage through the grating 35.

It is thus seen that there are two direct feeding passages through thebody of the stove, one for the purpose of absorbing moisf ture toproperly temper it, and the other for the purpose of insuring thecomplete and secondary combustion or burning of the gases which issuefrom the burner.

What is claimed is:

1. A gas stove comprising a stove body open at its top and bottom, aburner arranged in the body, a heating drum surrounding the burner andopening at its lower end through the front of the stove body and beingopen at its top, and a super-heating drum arranged above the opening inthe lower end of said first drum and adapted to be heated by the burningof gases from said burner and adapted to ignite any gases liberated fromthe burner and tending to rise through said first drum.

2. In a gas stove, a body open at its bottom and top, a pair of drumsarranged one upon the other in said body and providing inner and outerair passages within the body, means for supplying moisture to the air inone passage, and means for heating the air in the other passage.

3. In a heating stove, the combination of a body open at its top andbottom, a pair of drums arranged in the body and spaced from the wallsthereof and from each other to provide inner and outer air passages, aburner arranged in one drum to directly heat ir therein and to heat thesecond drum, said second drum being adapted to ignite gases escapingfrom the first drum, and said drums being adapted to heat the air risingin both passages.

4. In a gas heating stove, the combination of a body open at its top andbottom, a heat ing drum mounted in the stove body and opening throughthe front wall thereof and being open at 1ts top, a burner in saidheating drum adapted to directly heat air there in and effect upwardcirculation of air through the front wall and through the top of thedrum, said drum being spaced from the walls of said body and providingan outer passage for air rising through the bottom of the body, and asuper-heating drum suspended from the body into said first drum abovethe burner to be heated thereby and providing with said second drum arestricted passage for the directly heated air and gases escaping fromthe first drum, and means for supplying moisture E0 the air risingthrough the bottom of the ody.

5. In a gas heating stove, the combination of a body open at its top andbottom, a heating drum arranged in spaced relation to the bottom withinthe body and opening at one side through the front of the body and beingopen at its top, said heating drum being spaced from the walls of thebody to provide an outer air passage, a moisture pan supported in thebody beneath said drum and about which air is adapted to rise into saidouter passage, a burner in said drum adapted to directly heat airtherein and to heat the drum, a second drum suspended in the first drumand being of less dimensions than the same to provide a restrictedpassage for the rise of the directly heated air from the first drum,said second drum being adapted to be raised to a relatively hightemperature whereby to ignite any gases tending to escape from saidfirst drum.

JOHN F. DOMHOFF. .ROBERT M. SABO.

